Discussion Overview
The discussion revolves around finding software or packages suitable for calculating tensor loop integrals, specifically of rank four and involving three and four vertices, within the context of high energy physics. Participants explore various software options and methodologies related to tensor and scalar integrals.
Discussion Character
- Exploratory
- Technical explanation
- Debate/contested
Main Points Raised
- One participant inquires about software used by CERN or other particle accelerators for calculating tensor loop integrals.
- Another participant suggests exploring high energy physics software projects hosted at HepForge as potential resources.
- There is a discussion about the preference for tensor integrals versus reduced scalar integrals, with one participant noting that typically a reduction to scalar integrals is performed before numerical solutions are applied using packages like OneLOop or looptools.
- One participant mentions the advantages of OneLOop, including its capability to provide integrals in dimensional regularization and handle complex masses, while looptools is noted for its compatibility with Mathematica.
- A participant expresses the need for a database of coefficients for reduction, indicating that manual reduction is impractical due to the complexity of their terms.
Areas of Agreement / Disagreement
Participants do not reach a consensus on the necessity of tensor integrals versus scalar integrals, as there are differing views on the preferred approach to solving these integrals.
Contextual Notes
There are unresolved questions regarding the availability of specific databases for coefficients and the practicality of manual versus automated reduction methods.